The Children’s Museum of New Hampshire enjoys a larger home than the cozy house it once occupied in Portsmouth, and with it comes room for kids to build flying machines, study a river’s story, measure brain waves, and more. Open seven days a week in summer. Highlights include mini-camps, a summer fun week in July, and a science week in August.

6 Washington St., Dover, N.H., 603-742-2002, www.childrens-museum.org, $7.